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Biomass pretreatment process

a pretreatment process and biomass technology, applied in the direction of cellulose treatment using microorganisms/enzymes, other chemical processes, applications, etc., can solve the problems of reducing yield, reducing yield, and complex hemicellulytic system

Active Publication Date: 2012-05-03
CHEMTEX ITAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a process for improving the treatment of biomass by soaking it in water and then exploding it with steam. This process creates a new liquid and solid stream, which can be combined with other liquid streams. The technical effect of this process is to create a more efficient and effective way to treat biomass for various applications.

Problems solved by technology

The technical problem addressed in this patent text is finding a way to convert lignocellulosic biomass into ethanol while producing little or no harmful by-products like furfural. This requires a highly effective but severe process with a high degree of accessibility (measured through the ro parameter) to the plant's structures.

Method used

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Examples

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Effect test

example 1

[0106]Arundo has the following composition: 37.5% glucans, 19.3% xylans, 5.8% acetyl groups, 22.6% Klason lignin 6.3% ash, 8.5% extractives.

[0107]Arundo was submitted to continuous steam explosion (Stake Tech reactor) at 200° C. for 6 minutes. This pretreatment lead to a solubilisation of 70.6% of xylan and 8.6% of glucan. A 19.3% of xylan were degraded to inhibitor compounds (furfural and other degradation product), and 1.9% of glucans were degraded to inhibitors compounds (HMF and formic acid)

[0108]An amount of pretreated material which composition can be summarized in solvent, soluble solid, insoluble solid, is added to a laboratory fermenter. Solvent (water, buffer, antibacterial solution) and catalyst solution are added to this material in order to reach a total solid content of 7.5%. Catalysts solution is calculated to have an activity of 60 FPU / g glucans and 109 FXU / g xylan for pretreated Arundo.

[0109]The composition of the stream entering the enzymatic hydrolysis is shown i...

example 2

[0113]Arundo has the following composition: 37.5% glucans, 19.3% xylans, 5.8% acetyl groups, 22.6% Klason lignin 6.3% ash, 8.5% extractives.

[0114]Arundo was submitted to continuous steam explosion (Stake Tech reactor) at 215° C. for 6 minutes. This pretreatment lead to a solubilisation of 90.8% of xylan and 7.1% of glucan. A 63.8% of xylan were degraded to inhibitor compounds (furfural and other degradation product), and 4.5% of glucans were degraded to inhibitors compounds (HMF and formic acid)

[0115]An amount of pretreated material which composition can be summarized in solvent, soluble solid, insoluble solid, is added to a laboratory fermenter. Solvent (water, buffer, antibacterial solution) and catalyst solution are added to this material in order to reach a total solid content of 7.5%. Catalysts solution is calculated to have an activity of 60 FPU / g glucans and 248 FXU / g xylan for pretreated Arundo.

[0116]The composition of the stream entering the enzymatic hydrolysis is shown i...

example 3

[0121]Fiber sorghum has the following composition: 35.8% glucans, 20.0% xylans, 5.61% acetyl groups, 17.3% Klason lignin 6.4% ash, 14.8% extractives.

[0122]Chopped sorghum was submitted to continuous steam explosion (Stake Tech reactor) at 200° C. for 6 minutes. This pretreatment lead to a solubilisation of 86.6% of xylan and 25.5% of glucan. A 61.7% of xylan were degraded to inhibitor compounds (furfural and other degradation product), and 8.0% of glucans were degraded to inhibitors compounds (HMF and formic acid)

[0123]An amount of pretreated material which composition can be summarized in solvent, soluble solid, insoluble solid, is added to a laboratory fermenter. Solvent (water, buffer, antibacterial solution) and catalyst solution are added to this material in order to reach a total solid content of 7.5%. Catalysts solution is calculated to have an activity of 60 FPU / g glucans and 220 FXU / g xylan for pretreated Sorghum.

[0124]The composition of the stream entering the enzymatic h...

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Abstract

The process for the treatment of ligno-cellulosic biomass comprises the steps of:
    • A) Soaking a ligno-cellulosic biomass feedstock in vapor or liquid water or mixture thereof in the temperature range of 100 to 210° C. for 1 minute to 24 hours to create a soaked biomass containing a dry content and a first liquid;
    • B) Separating at least a portion of the first liquid from the soaked biomass to create a first liquid stream and a first solid stream; wherein the first solid stream comprises the soaked biomass; and
    • C) Steam exploding the first solid stream to create a steam exploded stream comprising solids and a second liquid.

Description

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Claims

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Application Information

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Owner CHEMTEX ITAL
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